For buyers contracting authority
Pick 72227000 when the deliverable is advice about integration, not the integration build itself. A contracting authority reaches for it to plan how systems should connect, to design an integration approach before a large programme, or to bring in a specialist who advises on interfaces, middleware and data exchange between platforms.
The boundary that trips contracting authorities is the hardware sibling, 72228000 (Hardware integration consultancy services). That code is for advice on integrating physical equipment and devices; 72227000 is scoped to the software layer. Where the engagement is really about managing a delivery programme rather than the integration design, project management consultancy (72224000) is the better fit.
One more line to watch: if the contract's main output is working, integrated software rather than a recommendation, that is integration delivery or development, not consultancy. Reserve 72227000 for engagements where the design, the assessment, or the integration plan is what gets accepted and paid for. Where a single contract folds advice into a larger delivery, set the primary CPV code by the dominant deliverable.